bazi-mcp
An open-source Bazi MCP server that helps AI agents produce deterministic Four Pillars chart JSON instead of asking an LLM to calculate stems, branches, and solar terms itself.
Tool overview
Adoption judgment: bazi-mcp is worth a small-scale trial if you are building an AI agent that needs Bazi chart calculation, but the available evidence is not strong enough to recommend it for production or complex astrology products. Its main value is an engineering safeguard against having an LLM calculate stems, branches, solar terms, and related calendar rules directly; the evidence does not establish that its interpretations or predictions are valid.
In practice, it is positioned as an MCP server that delegates Four Pillars calculation to a deterministic engine and lets the AI explain the returned JSON. The social post mentions true solar time, time zones, Zi-hour day rollover, and clash/combine/punishment relationships, and presents npx-based integration with Claude, Cursor, and Codex. It also says calculations run locally without uploading data. Those details come from a social demonstration or project description, not from independent tests, benchmarks, or a tutorial that verifies edge cases.
The entry cost may be relatively low because the example uses npx -y @openfate/bazi-mcp, but that is a community-facing usage example, not official pricing or a stable cost guarantee.